Beam-Scanning Spectrum Occupancy Feedback for Narrow-Beam Scheduling
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Solution Overview
Problem
In high-frequency radio communication systems, such as those using millimeter waves, the Listen Before Talk (LBT) process can lead to inaccurate spectrum occupancy assessments due to interference, resulting in resource waste or signal interference, especially when using narrow beams with strong directivity.
Innovation Solution
Implement beam scanning by network nodes to determine the occupancy of target spectra and feed back occupancy information for resource scheduling, using multiple beams to cover different regions and reduce erroneous judgments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LBT test is performed to determine spectrum occupancy, then channel access is controlled to avoid interference, but measurement accuracy deteriorates due to interference from other nodes
Solution Approach 1:
The patent divides the spectrum monitoring task into multiple beam directions. Instead of using a single omnidirectional LBT test, the system performs segmented LBT tests along different beam directions (first beam direction, second beam direction, etc.). Each beam direction independently assesses occupancy, allowing the system to identify which specific directions are occupied and which are available, thereby improving measurement precision while maintaining reliable channel access control.
Solution Approach 2:
The patent introduces a spatial dimension to spectrum occupancy assessment by utilizing multiple beam directions. Instead of a single scalar occupancy indicator from omnidirectional LBT, the system creates a multi-dimensional view of spectrum availability across different spatial directions. This dimensional expansion allows accurate identification of directional occupancy patterns, resolving the contradiction between interference avoidance and accurate measurement.
2Productivity
If narrow beams with strong directivity are used to meet higher rate demands, then transmission efficiency is improved, but measurement precision deteriorates due to limited coverage area
Solution Approach 1:
The patent segments the spatial monitoring task across multiple narrow beams. Each narrow beam maintains its strong directivity and high transmission efficiency for data communication, while collectively they cover a broader spatial area for occupancy detection. The system performs LBT tests on each beam direction separately, ensuring that the measurement precision is not compromised by the limited coverage of individual narrow beams.
Solution Approach 2:
The patent merges the results from multiple narrow beam LBT tests to form a comprehensive spectrum occupancy assessment. By combining the occupancy information from different beam directions, the system achieves both the high transmission efficiency of narrow beams and the broad coverage needed for accurate measurement. The merged occupancy indicator reflects the aggregated state across all monitored directions.
Data Source
AI summary
An information transmission method, includes: a first network node performing beam scanning on a target spectrum; and feeding back occupancy information of the target spectrum determined based on the beam scanning to a second network node, where the occupancy information is used for the second network node to determine resource scheduling on the target spectrum.